Commit 4201f4e8 authored by Leonard Crestez's avatar Leonard Crestez Committed by Stefan Agner
Browse files

drm/mxsfb: Add pm_runtime calls to pipe_enable/disable 



Adding lcdif nodes to a power domain currently results in
black/corrupted screens or hangs because power is not correctly enabled
when required.

Ensure power is on when display is active by adding
pm_runtime_get/put_sync to mxsfb_pipe_enable/disable.

Signed-off-by: default avatarLeonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: default avatarStefan Agner <stefan@agner.ch>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/ee88148399c63494cda4129b05444b0ac331b7a7.1537191359.git.leonard.crestez@nxp.com
parent 2dc3620e

drivers/gpu/drm/mxsfb/mxsfb_drv.c

+4 −0
Original line number Diff line number Diff line
@@ -103,7 +103,9 @@ static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe, 
			      struct drm_plane_state *plane_state)

{

	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

	struct drm_device *drm = pipe->plane.dev;



	pm_runtime_get_sync(drm->dev);

	drm_panel_prepare(mxsfb->panel);

	mxsfb_crtc_enable(mxsfb);

	drm_panel_enable(mxsfb->panel);
@@ -112,10 +114,12 @@ static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe, 
static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)

{

	struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);

	struct drm_device *drm = pipe->plane.dev;



	drm_panel_disable(mxsfb->panel);

	mxsfb_crtc_disable(mxsfb);

	drm_panel_unprepare(mxsfb->panel);

	pm_runtime_put_sync(drm->dev);

}



static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,